[workflow] signing commits

Signed-off-by: dd di cesare <[email protected]>

.github/workflows/release.yaml

@@ -55,7 +55,7 @@ jobs:
         run: |
           git config --global user.name "github-actions[bot]"
           git config --global user.email "github-actions[bot]@users.noreply.github.com"
-          git add -A && git commit -m "Prepared release v${{ inputs.limitadorOperatorVersion }}"
+          git add -A && git commit -m -s "Prepared release v${{ inputs.limitadorOperatorVersion }}"
           git push origin release-v${{ inputs.limitadorOperatorVersion }}
       - name: Create release
         uses: softprops/action-gh-release@v1